#!/usr/bin/env python3

"""
***************************************************************************
    widgets_tree.py
    ---------------------
    Date                 : May 2011
    Copyright            : (C) 2011 by Martin Dobias
    Email                : wonder dot sk at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Martin Dobias'
__date__ = 'May 2011'
__copyright__ = '(C) 2011, Martin Dobias'

"""
Reads .ui files from ../src/ui/ directory and write to stdout an XML describing
widgets tree.

Python bindings must be compiled and in PYTHONPATH

QGIS libraries must be in LD_LIBRARY_PATH

Output should go to ../resources/customization.xml

"""

import sys
import os
import glob
from qgis.PyQt.QtWidgets import QWidget, QDialog, QCheckBox, QComboBox, QDial, QPushButton, QLabel, QLCDNumber, QLineEdit, QRadioButton, QScrollBar, QSlider, QSpinBox, QTextEdit, QDateEdit, QTimeEdit, QDateTimeEdit, QListView, QProgressBar, QTableView, QTabWidget, QTextBrowser, QDialogButtonBox, QScrollArea, QGroupBox, QStackedWidget
from qgis.PyQt.uic import loadUi
from qgis.PyQt.QtXml import QDomDocument

# qwt_plot is missing somehow but it may depend on installed packages
from qgis.PyQt import Qwt5 as qwt_plot

sys.modules['qwt_plot'] = qwt_plot

# loadUi is looking for custom widget in module which is lowercase version of
# the class, which do not exist (AFAIK) -> preload them, problems anyway:
# missing in gui: QgsColorRampComboBox, QgsRendererRulesTreeWidget,
# QgsRendererRulesTreeWidget
# and QgsProjectionSelector cannot open db file
from qgis import gui
for m in ['qgscolorbutton', 'qgscolorrampcombobox', 'qgsprojectionselector', 'qgslabelpreview', 'qgsrulebasedrendererwidget', 'qgscollapsiblegroupbox', 'qgsblendmodecombobox', 'qgsexpressionbuilderwidget', 'qgsrasterformatsaveoptionswidget', 'qgsrasterpyramidsoptionswidget', 'qgsscalecombobox', 'qgsfilterlineedit', 'qgsdualview']:
    sys.modules[m] = gui


class UiInspector:

    def __init__(self):
        self.ui_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), '../src/ui/*.ui'))
        self.printMsg("Loading UI files " + self.ui_dir)
        # list of widget classes we want to follow
        self.follow = [
            QWidget, QDialog,
            QCheckBox, QComboBox, QDial, QPushButton, QLabel, QLCDNumber, QLineEdit, QRadioButton, QScrollBar, QSlider, QSpinBox, QTextEdit,
            QDateEdit, QTimeEdit, QDateTimeEdit, QListView, QProgressBar, QTableView, QTabWidget, QTextBrowser, QDialogButtonBox,
            QScrollArea, QGroupBox, QStackedWidget,
        ]

    def printMsg(self, msg):
        sys.stderr.write(msg + "\n")

    def widgetXml(self, element, widget, level=0, label=None):
        # print tostring ( element )
        # self.printMsg ( "class: " + str( type ( widget ) ) )
        # self.printMsg ( "objectName: " + widget.objectName() )
        # self.printMsg ( "windowTitle: " + widget.windowTitle() )

        if not widget.objectName():
            return

        lab = label
        if hasattr(widget, 'text'):
            lab = widget.text()
        if widget.windowTitle():
            label = widget.windowTitle()
        if not lab:
            lab = ''

        subElement = self.doc.createElement('widget')
        subElement.setAttribute('class', widget.__class__.__name__)
        subElement.setAttribute('objectName', widget.objectName())
        subElement.setAttribute('label', lab)
        element.appendChild(subElement)

        # print str ( widget.children () )
        # tab widget label is stored in QTabWidget->QTabBarPrivate->tabList->QTab ..
        if type(widget) in [QTabWidget]:
            children = list({'widget': widget.widget(i), 'label': widget.tabText(i)} for i in range(0, widget.count()))
        else:
            children = list({'widget': c, 'label': None} for c in widget.children())
        for child in children:
            w = child['widget']
            if w.isWidgetType() and (type(w) in self.follow):
                self.widgetXml(subElement, w, level + 1, child['label'])

    def xml(self):
        self.doc = QDomDocument()
        element = self.doc.createElement("qgiswidgets")
        self.doc.appendChild(element)
        for p in glob.glob(self.ui_dir):
            self.printMsg("Loading " + p)
            # qgsrasterlayerpropertiesbase.ui is giving: No module named qwt_plot
            try:
                widget = loadUi(p)
                # print dir ( ui )
                self.widgetXml(element, widget)
            except Exception as e:
                self.printMsg(str(e))

        return self.doc.toString(2)


if __name__ == '__main__':
    from qgis.PyQt.QtCore import QApplication

    app = QApplication(sys.argv)  # required by loadUi
    inspector = UiInspector()
    xml = inspector.xml()
    sys.stdout.write(xml)
    sys.stdout.flush()

    del app
    sys.exit(0)
